There are two species, the Cookie-cutter Shark and Large- tooth Cookie-cutter Shark.
The Large-tooth Cookie Cutter are the smaller of the two, but it has bigger teeth. its teeth are bigger in relation to its body size than those of any other shark.
Cookie-cutter Sharks are brown in colour, with greenish eyes.
Instead of eating whole animals, Coookie-cutter Sharks take bites out of much bigger sea creatures such as big sharks and whales.
To feed, a Cookie -cutter Shark attaches itself to its prey by sucking with its mouth. then it swivels its sharp teeth around in the circle until it has cut out a lump flesh.
Cookie-cutter Sharks themselves are not big - only around 50 cm long. Because they don't need to catch or kill their prey, they can feed on the animals that are many times larger than they are.
Many sharks, dolphins, porpoises and whales have permanent, round scars left by Cookie-cutter Sharks.
" Cookie-cutter Sharks have been known to take bites out parts of submarines and undersea cables".
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